I have played most custom maps and the vast majority are CTF or 5 CP point maps. Personally I think this mode is the most exciting, non-linear and versatile mode out there. The whole attack/defend a fort or item of value like a missile or submarine or whatever and then the teams switch roles I find most fun. Mirror maps are dull and linear with predictable push retreat rhythms and ctf maps are mainly defensive. The A+B before C is unlocked is far more unpredictable and the whole map is centred around attack. I think a few maps out there already could be switched to this and would be improved massively.